Is there a smarter way to do this?

In order to avoid the unsightly #Div/0! appearing in printouts, where I do a
divide, I almost always do this:

=if(isnumber(A1/B1),A1/B1,"--")

Is there a way to tell excel to always show a specific value (in my case
"--") whenever a #Div/0! shows up, so that I don't have to handle the
exceptions in the cell formulae myself?

The example above is really too simple. Often the division are built from
much more complicated calculations which can make the whole if statement a
200 letters long.

Thanks.